Well I've got a few plans for this truck... Let me know what you think. 1. In the trunk, I am planning on doing an aftermarket sub that will blend into the stock plastic just to give it a little more boom. Probably a 10" with about 600w going to it. Box will be fiberglass. I still need to use the trunk for various things so I cant afford anything too radical. 2. Definitely some lighting upgrades. I already have HID Hi-Beams but I'm just looking for more light. (DDM 3000k 35w fogs coming soon). I have heard that HID's will start flickering with DRL's so IDK about the headlights. 3. The audio in the Captiva is actually pretty good stock, Just would like a little more boom. 4. Exhaust. Not too sure what would sound good on a 3.0 SIDI. I have 2 mufflers on it now, one by the rear passenger seat, and one in the very back that splits it into duals. My plan 2.5" pipe from the rear axle back with a Y pipe to keep my duals. and keep my stock setup if it sounds good. If not, I'll probably go with a Cherry Bomb or Magnaflow, maybe even a Borla. You never know. Anything that I'm missing or you think would be cool let me know.